/*
 *   Copyright (c) 2008, Ueda Laboratory LMNtal Group <lmntal@ueda.info.waseda.ac.jp>
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions are
 *   met:
 *
 *    1. Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *
 *    3. Neither the name of the Ueda Laboratory LMNtal Group nor the
 *       names of its contributors may be used to endorse or promote
 *       products derived from this software without specific prior
 *       written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

package lavit.util;

import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;

//http://d.hatena.ne.jp/ruby-U/20080618/1213757977を参考

public class FixFlowLayout extends FlowLayout {
	public Dimension preferredLayoutSize(Container target) {
		synchronized (target.getTreeLock()) {

			int hgap = getHgap();
			int vgap = getVgap();
			int seprWidth   = target.getParent().getWidth();
			int tempWidth   = 0;
			int tempHeight  = 0;
			int totalHeight = 0;
			int lineCount   = 1;

			for (int i = 0, i_n = target.getComponentCount(); i < i_n; i++) {
				Component m = target.getComponent(i);
				Dimension d = m.getPreferredSize();
				tempWidth += hgap;
				if(tempWidth + d.width > seprWidth){
					totalHeight += tempHeight;
					tempHeight = 0;
					tempWidth  = 0;
					lineCount++;
				}
				tempHeight = Math.max(tempHeight, d.height);
				tempWidth += d.width;
			}
			totalHeight += tempHeight + (lineCount+1)*vgap;
			return new Dimension(seprWidth, totalHeight);
		}
	}
}
